[Videx]

Your question is very confused. Basically you just want to ad a link to "My Subscriptions" on the menu bar. I think.

Probably not too difficult if you're a coder. But even with my experience with vbulletin, I wouldn't attempt it myself. It would require copying lines from one file and duplicating them in another. Consider just hiring someone to make a mod to do it.

And don't expect it to be used a lot. After someone makes a lot of posts the function is sort of useless; a Google Site Search is much more effective.